Cassiopeia

The figures worth remembering, read straight from the data — no editorial picking.

• Played almost exclusively Mid (93.7% of its games).
• Peak popularity in 2017: 353 games, 51.3% win rate.
• Noticeably more picked on the red side (56.4% of its picks).
• Games featuring it run 0.8 min longer than average (34m 44s against 33m 53s).
• Best duo: alongside Zac, 70.6% over 34 games (+19 pts against its own average).
• Hardest matchup: against LeBlanc in Mid, 43.5% over 46 duels.
• Longest win streak: 11, from July 16, 2017 to July 22, 2017.
• The team that played it most is Cloud9 (48 games, 62.5%).
• Strongest on it: Knight at 1639 domination rating over 24 games on Cassiopeia.

How this champion performs in the current season, independently of its past. The sections below cover the full history and say so.

260 games this season, 55% win rate, 41st most played of the 155 champions picked in 2026. Win rate up 4.2 points against 2025.

Teams that played it most · 2026

Team	Games	WR
Anyone's Legend	13	38.5%
Bilibili Gaming	12	75%
Ninjas in Pyjamas.CN	9	66.7%
DN SOOPers	9	33.3%
Karmine Corp	9	55.6%
Top Esports	9	77.8%

How far each player outplays his direct opponent when he picks this champion — not his career rating. Same 1500 scale, games on this champion only (20+).

1. 1 Knight 1639 -67 Active #3 · #2 Mid · 24 games · 58.3%
2. 2 Doinb 1615 -22 · 23 games · 60.9%
3. 3 Faker 1577 -109 Active #7 · #3 Mid · 37 games · 70.3%
4. 4 Bjergsen 1576 -2 · 26 games · 69.2%
5. 5 PowerOfEvil 1543 0 · 26 games · 65.4%
6. 6 Rookie 1539 -87 Active #21 · #5 Mid · 29 games · 55.2%
7. 7 Jensen 1518 -33 · 40 games · 57.5%
8. 8 Perkz 1507 -73 · 24 games · 62.5%
9. 9 Kuro 1503 -71 · 20 games · 60%
10. 10 Ryu 1499 -65 · 22 games · 50%
11. 11 Shanks 1496 -23 Active #102 · #21 Mid · 24 games · 50%
12. 12 Cool 1495 -68 · 21 games · 57.1%

All seasons combined — the current-season read is further up. How this champion is actually used: which role, which side of the map, and whether it shows up more in playoffs than in regular season.

Bars show pick volume, the line shows win rate. The dashed line marks 50%.

Across all seasons (2012–2026): a single season does not supply enough shared games. Allies seen at least 25 times alongside Cassiopeia. The gap is measured against its own 51.6% average, not against 50%. The Role column is the one held by the ally.

Strongest

Ally	Role	Games	WR	Gap
Zac	Jungle	34	70.6%	+19
Cho'Gath	Top	39	69.2%	+17.6
Kog'Maw	Bot	43	65.1%	+13.5
Skarner	Jungle	48	62.5%	+10.9
Rumble	Top	101	61.4%	+9.8
Pantheon	Jungle	31	61.3%	+9.7
Galio	Support	36	61.1%	+9.5
Shen	Top	112	60.7%	+9.1

Weakest

Ally	Role	Games	WR	Gap
Aphelios	Bot	32	34.4%	-17.2
Wukong	Jungle	32	34.4%	-17.2
Nami	Support	41	36.6%	-15
Elise	Jungle	73	38.4%	-13.2
Kennen	Top	30	40%	-11.6
Leona	Support	49	40.8%	-10.8
Morgana	Support	44	40.9%	-10.7
Aatrox	Top	56	41.1%	-10.5

Across all seasons (2012–2026): direct opposition in the same role, over at least 25 duels.

Favourable

Opponent	Role	Duels	WR	Gap
Orianna	Mid	92	57.6%	+6
Anivia	Mid	25	56%	+4.4
Karma	Mid	25	56%	+4.4
Ahri	Mid	44	54.5%	+2.9
Corki	Mid	70	54.3%	+2.7
Ryze	Mid	255	53.7%	+2.1
Vladimir	Mid	54	53.7%	+2.1
Viktor	Mid	112	53.6%	+2

Unfavourable

Opponent	Role	Duels	WR	Gap
LeBlanc	Mid	46	43.5%	-8.1
Galio	Mid	69	46.4%	-5.2
Jayce	Mid	30	50%	-1.6
Syndra	Mid	73	50.7%	-0.9
Azir	Mid	65	52.3%	+0.7
Taliyah	Mid	64	53.1%	+1.5
Viktor	Mid	112	53.6%	+2
Vladimir	Mid	54	53.7%	+2.1

All seasons combined, so defunct leagues show up too — EU LCS and NA LCS became the LEC and the LCS. Where this champion is played, and by whom: regional habits are often stronger than any global trend.

By league

• LPL 364 · 51.9%
• LCK 222 · 47.3%
• NA LCS 180 · 52.8%
• LMS 135 · 57%
• LEC 122 · 47.5%
• EU LCS 115 · 51.3%
• Worlds 108 · 48.1%
• Champions / OGN 74 · 55.4%

Teams that played it most

Team	Games	WR
Cloud9	48	62.5%
Team Liquid	47	53.2%
Fnatic	42	57.1%
G2 Esports	42	57.1%
Machi Esports	40	55%
Team WE	38	52.6%
Invictus Gaming	37	54.1%
SK Telecom T1	36	77.8%
Oh My God	29	48.3%
TSM	29	69%

Short answers meant to stand on their own, out of context.

What is the best duo with Cassiopeia?

Zac as Jungle: 70.6% wins over 34 games together, +19 points against Cassiopeia's 51.6% average.

Which champion counters Cassiopeia in Mid?

LeBlanc in Mid: Cassiopeia only wins 43.5% of their 46 direct duels, -8.1 points below its average.

Which lane does Cassiopeia play in pro?

Mainly Mid, which accounts for 93.7% of its 1,525 major-league games, with a 52.2% win rate.

Is Cassiopeia good in professional play?

Over 1,525 major-league games since 2012, Cassiopeia holds a 51.6% win rate. Its most played season was 2017 with 353 games, and it was last picked on September 6, 2026.

Longest consecutive runs of wins and losses, with the dates that bound them. Long runs come as much from schedule as from form.

Record	Value
Longest win streak	11 · July 16, 2017 → July 22, 2017
Longest loss streak	10 · May 22, 2015 → May 22, 2015
Average game length	34m 44s · 33m 53s
Longest game	66m 50s · Counter Logic Gaming vs Team EnVyUs
Shortest game	18m 44s · NSNaJin Shield vs GJGJR